a) Describe an activity to demonstrate the magnetic field lines around the straight current carrying conductor. state the rule to determine the direction of magnetic field. b) Describe an activity to demonstrate the magnetic field lineal around circular loop. state the rule to determine the direction of magnetic field. c) Describe an activity to demonstrate the force acting on a current carrying conductor placed in magnetic Field. state the rule to determine the direction of force.
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The pattern of magnetic field lines around a straight conductor carrying current can be described by the following activity.
(i) Insert vertically a long straight wire carrying an electric current so that it passes through the centre of a horizontal piece of plastic boardasshowninfigure.
(ii) Take care that the plastic board is fixed and does not move up and down. Now, sprinkle some iron filings onto the plastic board to show the shape of the field.
(iii) You will notice that the iron filings get arrangedround the wires in the shape of circles. This is due to the reason that the magnetic field lines around the current carrying straight conductor are circular. The iron filings align along these field lines.
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